NCT00342732

Brief Summary

The prevalence of obesity in the United States has reached alarming proportions with 33% of adults over the age of 20 being overweight. Obesity is more than twice as prevalent, however, in the Pima Indians of Arizona. Although there have been a number of advances in our understanding of the genetics of obesity, the environmental influences on the genetic expression of obesity requires further investigation. In an effort to understand some of the influences on the high prevalence of obesity in the Pima Indians, the present study was designed to investigate eating behaviors and food preferences, most especially the preference for high fat foods, in sib-pairs of Pima Indians who have been previously genotyped in our genomic scan for loci linked to diabetes/obesity. Most specifically, we will utilize several questionnaires and methods of assessing eating behavior and the preference for high fat foods to create a food intake phenotype. In addition, we will study Caucasians so that comparisons can be made between these two groups. We will make these evaluations by assessing eating behavior, food preferences including usual fat intake and preferences for high fat foods, body image perceptions, and energy expenditure. It is hoped that the data gathered from this study will elucidate some of the risk factors for the development of obesity among the Pima Indians....

Trial Health

80
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
669

participants targeted

Target at P75+ for all trials

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

November 24, 1999

Completed
6.6 years until next milestone

First Submitted

Initial submission to the registry

June 19, 2006

Completed
2 days until next milestone

First Posted

Study publicly available on registry

June 21, 2006

Completed
Last Updated

May 1, 2026

Status Verified

March 13, 2026

First QC Date

June 19, 2006

Last Update Submit

April 30, 2026

Conditions

Keywords

GeneticsFat IntakeWeight ControlAppetite ControlNatural History

Outcome Measures

Primary Outcomes (1)

  • Ad libitum food intake

    Ad libitum food intake measured in kcal/day averaged over 3 days

    Baseline, up to day 3

Study Arms (1)

non-diabetic volunteers

non-diabetic volunteers aged 18-65 who are healthy as determined by medical history, physical examination, and laboratory tests

Eligibility Criteria

Age18 Years - 65 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Residents of Phoenix metropolitan area

You may qualify if:

  • Healthy, as determined by medical history, physical examination, and laboratory tests.
  • years old
  • Non-diabetic status

You may not qualify if:

  • Hypo- or hyper-thyroid
  • Blood pressure greater than 160/95
  • Cardiovascular disease
  • Gallbladder disease
  • Alcohol and/or current use of drugs (more than 2 drinks per day and regular use of drugs such as amphetamines, cocaine, or heroin)
  • Psychiatric conditions or behavior that would be incompatible with safe and successful participation in this study, including claustrophobia and eating disorders such as anorexia or bulimia nervosa
  • \. Use of medications affecting metabolism and appetite
  • \. Pregnancy
  • \. Current use of nicotine products, including tobacco, electronic cigarettes, and nicotine replacement therapies that exceed Very Low Dependence on the Fagerstr(SqrRoot)(Delta)m Test for Nicotine Dependence Tool (score greater than 2).
  • Subjects may be excluded or withdrawn from the study if they have any conditions not specifically mentioned above that may interfere with the collection of the food intake. This includes such issues as not following study and unit policies and procedures, diagnosis of contraindications following admission, and development of illness/infection unrelated to the study. For example, volunteers who do not comply with the vending machine protocol (i.e., share food, do not record what they eat, eat outside of room, etc) may be withdrawn from the study.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

NIDDK, Phoenix

Phoenix, Arizona, 85014, United States

Location

Related Publications (18)

  • Aydin BN, Stinson EJ, Cabeza De Baca T, Ando T, Travis KT, Piaggi P, Krakoff J, Chang DC. Investigation of seasonality of human spontaneous physical activity and energy expenditure in respiratory chamber in Phoenix, Arizona. Eur J Clin Nutr. 2024 Jan;78(1):27-33. doi: 10.1038/s41430-023-01347-y. Epub 2023 Oct 13.

  • Booker JM, Chang DC, Stinson EJ, Mitchell CM, Votruba SB, Krakoff J, Gluck ME, Cabeza de Baca T. Food insecurity is associated with higher respiratory quotient and lower glucagon-like peptide 1. Obesity (Silver Spring). 2022 Jun;30(6):1248-1256. doi: 10.1002/oby.23437.

  • Cabeza de Baca T, Piaggi P, Gluck ME, Krakoff J, Votruba SB. Meal-to-meal and day-to-day macronutrient variation in an ad libitum vending food paradigm. Appetite. 2022 Apr 1;171:105944. doi: 10.1016/j.appet.2022.105944. Epub 2022 Jan 21.

  • Basolo A, Hollstein T, Shah MH, Walter M, Krakoff J, Votruba SB, Piaggi P. Higher fasting plasma FGF21 concentration is associated with lower ad libitum soda consumption in humans. Am J Clin Nutr. 2021 Oct 4;114(4):1518-1522. doi: 10.1093/ajcn/nqab204.

  • Basolo A, Ando T, Chang DC, Hollstein T, Krakoff J, Piaggi P, Votruba S. Reduced Albumin Concentration Predicts Weight Gain and Higher Ad Libitum Energy Intake in Humans. Front Endocrinol (Lausanne). 2021 Mar 11;12:642568. doi: 10.3389/fendo.2021.642568. eCollection 2021.

  • Hollstein T, Basolo A, Ando T, Votruba SB, Krakoff J, Piaggi P. Urinary Norepinephrine Is a Metabolic Determinant of 24-Hour Energy Expenditure and Sleeping Metabolic Rate in Adult Humans. J Clin Endocrinol Metab. 2020 Apr 1;105(4):1145-56. doi: 10.1210/clinem/dgaa047.

  • Stinson EJ, Graham AL, Thearle MS, Gluck ME, Krakoff J, Piaggi P. Cognitive dietary restraint, disinhibition, and hunger are associated with 24-h energy expenditure. Int J Obes (Lond). 2019 Jul;43(7):1456-1465. doi: 10.1038/s41366-018-0305-9. Epub 2019 Jan 16.

  • Stinson EJ, Votruba SB, Venti C, Perez M, Krakoff J, Gluck ME. Food Insecurity is Associated with Maladaptive Eating Behaviors and Objectively Measured Overeating. Obesity (Silver Spring). 2018 Dec;26(12):1841-1848. doi: 10.1002/oby.22305. Epub 2018 Nov 14.

  • Basolo A, Heinitz S, Stinson EJ, Begaye B, Hohenadel M, Piaggi P, Krakoff J, Votruba SB. Fasting glucagon-like peptide 1 concentration is associated with lower carbohydrate intake and increases with overeating. J Endocrinol Invest. 2019 May;42(5):557-566. doi: 10.1007/s40618-018-0954-5. Epub 2018 Oct 3.

  • Stinson EJ, Piaggi P, Ibrahim M, Venti C, Krakoff J, Votruba SB. High Fat and Sugar Consumption During Ad Libitum Intake Predicts Weight Gain. Obesity (Silver Spring). 2018 Apr;26(4):689-695. doi: 10.1002/oby.22124. Epub 2018 Mar 4.

  • Stinson EJ, Krakoff J, Gluck ME. Depressive symptoms and poorer performance on the Stroop Task are associated with weight gain. Physiol Behav. 2018 Mar 15;186:25-30. doi: 10.1016/j.physbeh.2018.01.005. Epub 2018 Jan 9.

  • Basolo A, Votruba SB, Heinitz S, Krakoff J, Piaggi P. Deviations in energy sensing predict long-term weight change in overweight Native Americans. Metabolism. 2018 May;82:65-71. doi: 10.1016/j.metabol.2017.12.013. Epub 2018 Jan 3.

  • Ibrahim M, Thearle MS, Krakoff J, Gluck ME. Perceived stress and anhedonia predict short-and long-term weight change, respectively, in healthy adults. Eat Behav. 2016 Apr;21:214-9. doi: 10.1016/j.eatbeh.2016.03.009. Epub 2016 Mar 3.

  • Piaggi P, Thearle MS, Krakoff J, Votruba SB. Higher Daily Energy Expenditure and Respiratory Quotient, Rather Than Fat-Free Mass, Independently Determine Greater ad Libitum Overeating. J Clin Endocrinol Metab. 2015 Aug;100(8):3011-20. doi: 10.1210/jc.2015-2164. Epub 2015 Jun 18.

  • Bundrick SC, Thearle MS, Venti CA, Krakoff J, Votruba SB. Soda consumption during ad libitum food intake predicts weight change. J Acad Nutr Diet. 2014 Mar;114(3):444-449. doi: 10.1016/j.jand.2013.09.016. Epub 2013 Dec 8.

  • He J, Votruba S, Pomeroy J, Bonfiglio S, Krakoff J. Measurement of ad libitum food intake, physical activity, and sedentary time in response to overfeeding. PLoS One. 2012;7(5):e36225. doi: 10.1371/journal.pone.0036225. Epub 2012 May 22.

  • Venti CA, Votruba SB, Franks PW, Krakoff J, Salbe AD. Reproducibility of ad libitum energy intake with the use of a computerized vending machine system. Am J Clin Nutr. 2010 Feb;91(2):343-8. doi: 10.3945/ajcn.2009.28315. Epub 2009 Nov 18.

  • Votruba SB, Kirchner H, Tschop M, Salbe AD, Krakoff J. Morning ghrelin concentrations are not affected by short-term overfeeding and do not predict ad libitum food intake in humans. Am J Clin Nutr. 2009 Mar;89(3):801-6. doi: 10.3945/ajcn.2008.27011. Epub 2009 Jan 21.

MeSH Terms

Conditions

ObesityOverweightOvernutrition

Condition Hierarchy (Ancestors)

Nutrition DisordersNutritional and Metabolic DiseasesBody WeightSigns and SymptomsPathological Conditions, Signs and Symptoms

Study Officials

  • Susanne M Votruba, Ph.D.

    National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
observational
Observational Model
ECOLOGIC OR COMMUNITY
Time Perspective
CROSS SECTIONAL
Sponsor Type
NIH
Responsible Party
SPONSOR

Study Record Dates

First Submitted

June 19, 2006

First Posted

June 21, 2006

Study Start

November 24, 1999

Last Updated

May 1, 2026

Record last verified: 2026-03-13

Locations